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Elon Musk just said the quiet part out loud. During a September 15 appearance at the All-In Summit, the CEO of both Tesla and SpaceX described the question of merging his two flagship companies as a “great question.”
The comment alone would be enough to move markets. But it lands against a backdrop of accelerating operational overlap between the two companies, a record-breaking SpaceX IPO, and analyst estimates placing the probability of a merger as high as 80-90% by 2027.
The synergies are already here
On Tesla’s Q2 earnings call on July 22, Musk pointed to growing operational synergies between the two companies. The most prominent example is the Terafab chipmaking project, a joint semiconductor manufacturing initiative that represents one of the clearest points of integration between the automaker and the rocket company.
Then there’s Starlink, SpaceX’s satellite internet service, which has been woven into Tesla’s vehicle connectivity stack.
The AI thread connecting them got even tighter in February 2026, when SpaceX acquired xAI, Musk’s artificial intelligence startup. Tesla had previously invested $2B in xAI, and that stake converted to equity in SpaceX as part of the deal. So Tesla shareholders already have indirect exposure to SpaceX through the xAI acquisition.
SpaceX’s IPO changed the math
For years, one of the biggest practical obstacles to a Tesla-SpaceX merger was that SpaceX was private. That obstacle evaporated in June 2026, when SpaceX went public in what became the largest IPO on record. With both companies now trading on public markets, the mechanics of a stock-for-stock merger become dramatically simpler.
Wall Street is already pricing it in
Dan Ives of Wedbush and Gene Munster of Deepwater have both flagged the increasing collaboration between the two companies, expressing optimism about the strategic logic of a combination. The consensus estimate among analysts tracking the situation puts the probability of a merger happening in 2027 at 80-90%.
But Musk himself has tempered expectations, noting that any merger would require a formal process. That means board approvals on both sides, shareholder votes, and potentially months of regulatory review.
The regulatory gauntlet
Even if both boards and shareholder bases are enthusiastic, a deal of this magnitude would face serious scrutiny from US regulators. Combining the world’s most valuable automaker with the dominant commercial launch provider creates concentration-of-power questions that antitrust authorities would need to examine carefully.
There’s also the governance question. Musk already serves as CEO of both companies. A merger would create a corporate entity with an unprecedented range of government contracts, from NASA launches to Department of Defense satellites to federal EV tax credits.
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